Action Clutch ACR-3875 Stage 4 Single Disc Clutch Kit (1MD)

The Action Clutch ACR-3875 is a Stage 4 Single Disc Clutch Kit (1MD) engineered for maximum performance in demanding race environments. Built around an Unsprung MIBA Ceramic disc, this kit delivers instant, aggressive engagement with outstanding holding capacity — purpose-built for drag, road, and drift racing applications.

Key Features:

• Single diaphragm heavy-duty pressure plate with reinforced drive straps for increased durability
• Unsprung MIBA Ceramic disc — available in 4-puck or 6-puck configuration (4-puck is more aggressive)
• Lightweight unsprung hub for instant engagement and quicker, smoother shifting
• Up to 170% increase in holding capacity over stock clutch systems
• Rapid heat dissipation for sustained performance under high-stress conditions
• Aggressive pedal feel with quick, on/off engagement characteristics
• SFI 1.1 certified

What's Included:

• Unsprung MIBA Ceramic Disc (6-Puck)
• Single Diaphragm HD Pressure Plate
• Throwout / Release Bearing
• Pilot Bearing / Bushing (when applicable)
• Clutch Alignment Tool

Break-In Requirements: 500 street miles — keep RPMs under 4,500, no more than half-throttle, and no boost (if applicable). Proper break-in is required to retain product warranty and ensure longevity and full holding capacity.

Important Notes: The Stage 4 (1MD) kit is intended for race use only and is not recommended for daily street driving. Some clutch chatter is normal on ceramic unsprung kits and will decrease after proper break-in is completed. This kit is engineered for low to mild horsepower vehicles.